Codenamed Destiny, the project's contract was unsealed as part of the court documents in an ongoing suit between Activision and former Infinity Ward heads Jason West and Vince Zampella.
The 27-page contract - obtained by the the Los Angeles Times - details a four-game series developed over ten years from when the contact was made in 2010.
Destiny is described in the contract as a "sci-fantasy, action shooter." It will also be "massively multiplayer style" with "client based mission structures with persistent elements."
The description of the game as a massively multiplayer title matches rumours from 2011, which Bungie falsely claimed were a hoax at the time.
The first game in the four-part franchise is planned to release in fall of 2013, with subsequent releases in 2015, 2017 and 2019.
Also included in the plan are four downloadable expansion packs codenamed 'Comet' that will release between the main franchise titles in 2014, 2016, 2018 and 2020.
The second Destiny game is due to be released on Xbox 360, the next Xbox, the next PlayStation and PC. Target platforms for the third and fourth Destiny titles are not listed.
In the contract, Activision anticipates an ESRB rating of "Teen" in North America and a PEGI-16 rating in Europe.
Interestingly, Bungie will maintain ownership of the Destiny intellectual property, which is unusual among publishing agreements.
The contract also notes that Bungie is to work on a prototype for a new Marathon title, though no more than 5% of the studio's staff are permitted to work on the project.
It should be noted that the contract was written under projection in 2010. Though the contract lists a fall 2013 release for the first Destiny title on Microsoft's next Xbox, it is difficult to take the contract as confirmation for when the next Xbox console will be available.